S1AO903X01 single chip AM/FM digital tuner circuit

Published:2011/5/20 2:29:00 Author:Christina | Keyword: single chip, AM/FM, digital tuner | From:SeekIC

This circuit has three points of features: (1)The amplitude modulation circuit includes the radio frequency (RF) circuit, the mixer (MIX), the oscillator (OSC), the intermediate frequency (IF) amplifier (AMP), the detector (DET), the automatic gain control (AFC) circuit, the tuning LED driver circuit, the oscillator and the IF buffer circuit. (2)The tuning circuit includes the RF amplifier, the RF mixer, the oscillator, the IF amplifier, the tuning LED driver circuit, the IF amplifier, the tuning LED driver circuit.etc. (3)The other circuits are: the PLL, the stereo decoding circuit, the multiple voltage-controlled oscillator (MPX VCO), the LED controller / driver, the AM/FM programmable mixer, the AM/FM IF counter.etc. The internal circuit block diagram is as shown in the figure.



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